Fa'amaoniga

Tuuina atu ni fa'amatalaga taua, fa'atino i au fa'aoga fa'atasi ai ma le fa'amaoniaina o fomu HTML5, e ala i amioga fa'aletonu ole browser po'o sitaili masani ma le JavaScript.

I luga o lenei itulau

Matou te iloa o le taimi nei o sitaili faʻamaonia aganuʻu masani ma mea faigaluega e le mafai ona maua, talu ai e le o faʻaalia i tekinolosi fesoasoani. A'o matou galulue i se fofo, matou te fautuaina a le o le fa'aogaina o le itu-server filifiliga po'o le fa'aogaina o le su'esu'ega auala fa'amaonia.

E faapefea ona galue

O le auala lenei e galue ai le faʻamaoniaina o pepa ma Bootstrap:

O le faʻamaoniaina o pepa HTML e faʻaaogaina e ala i le lua pseudo-vasega a le CSS, :invalidma :valid. E faatatau i <input>, <select>, ma <textarea>elemene.
Bootstrap e fa'apipi'i le :invalidma :validsitaili i le .was-validatedvasega matua, e masani ona fa'aoga i le <form>. A leai, so'o se fanua mana'omia e aunoa ma se tau e fa'aalia e le aoga ile uta itulau. I lenei auala, e mafai ona e filifili pe o afea e faʻagaoioia ai (e masani lava pe a maeʻa ona taumafai le tuʻuina atu).
Ina ia toe faʻafoʻi foliga o le fomu (mo se faʻataʻitaʻiga, i le tulaga o le tuʻuina atu o pepa faʻamalosi e faʻaaoga ai le AJAX), aveese le .was-validatedvasega mai le <form>toe tuʻuina atu.
I le avea o se pa'u, .is-invalidma .is-validvasega e mafai ona faʻaaogaina nai lo le pseudo-vasega mo le faʻamaoniaina o le itu-aumau . Latou te le manaʻomia se .was-validatedvasega matua.
Ona o faʻalavelave i le auala e galue ai le CSS, e le mafai ona matou (i le taimi nei) faʻaoga sitaili i se <label>mea e sau i luma o le faʻatonutonuina o foliga i le DOM e aunoa ma le fesoasoani a le JavaScript masani.
O su'esu'ega fa'aonaponei uma e lagolagoina le API fa'amaonia fa'atapula'aina , o se fa'asologa o metotia JavaScript mo le fa'amaoniaina o fa'atonuga.
O fe'au fa'afofoga e mafai ona fa'aoga ai fa'aletonu ole su'esu'ega (ese'ese mo su'esu'ega ta'itasi, ma e le mafai ona fa'aogaina e ala i le CSS) po'o a tatou sitaili fa'aalia fa'apitoa fa'atasi ai ma HTML ma CSS fa'aopoopo.
E mafai ona e tu'uina atu fe'au fa'ale-aganu'u fa'atatau setCustomValidityile JavaScript.

Faatasi ai ma lena mea i lou mafaufau, mafaufau i faʻataʻitaʻiga o loʻo mulimuli mai mo a tatou sitaili faʻamaonia pepa masani, vasega i le itu-aumau, ma le faʻaogaina o suʻesuʻega.

Sitaili masani

Mo fe'au fa'amaonia faiga masani a Bootstrap, e mana'omia lou fa'aopoopoina o le novalidateuiga boolean i lau <form>. Ole mea lea e fa'amalo ai le browser default feedback tooltips, ae o lo'o maua pea le avanoa i le fa'amaoniga API i le JavaScript. Taumafai e tu'u le fomu i lalo; o le a fa'alavelaveina e le matou Javascript le fa'amau tu'u mai ma fa'asalalau atu fa'amatalaga ia te oe. A e taumafai e tu'uina atu, e te va'ai i le :invalidma :validsitaili e fa'aoga i au fa'atonuga.

O sitaili fa'aalia fa'apitoa e fa'aoga ai lanu fa'aleaganu'u, tuaoi, sitaili taula'i, ma ata pito i tua e fa'afeso'ota'i lelei ai fa'amatalaga. O ata pito i tua mo <select>s e na'o avanoa i le .form-select, ae le .form-control.

html

<form class="row g-3 needs-validation" novalidate>
  <div class="col-md-4">
    <label for="validationCustom01" class="form-label">First name</label>
    <input type="text" class="form-control" id="validationCustom01" value="Mark" required>
    <div class="valid-feedback">
      Looks good!
    </div>
  </div>
  <div class="col-md-4">
    <label for="validationCustom02" class="form-label">Last name</label>
    <input type="text" class="form-control" id="validationCustom02" value="Otto" required>
    <div class="valid-feedback">
      Looks good!
    </div>
  </div>
  <div class="col-md-4">
    <label for="validationCustomUsername" class="form-label">Username</label>
    <div class="input-group has-validation">
      <span class="input-group-text" id="inputGroupPrepend">@</span>
      <input type="text" class="form-control" id="validationCustomUsername" aria-describedby="inputGroupPrepend" required>
      <div class="invalid-feedback">
        Please choose a username.
      </div>
    </div>
  </div>
  <div class="col-md-6">
    <label for="validationCustom03" class="form-label">City</label>
    <input type="text" class="form-control" id="validationCustom03" required>
    <div class="invalid-feedback">
      Please provide a valid city.
    </div>
  </div>
  <div class="col-md-3">
    <label for="validationCustom04" class="form-label">State</label>
    <select class="form-select" id="validationCustom04" required>
      <option selected disabled value="">Choose...</option>
      <option>...</option>
    </select>
    <div class="invalid-feedback">
      Please select a valid state.
    </div>
  </div>
  <div class="col-md-3">
    <label for="validationCustom05" class="form-label">Zip</label>
    <input type="text" class="form-control" id="validationCustom05" required>
    <div class="invalid-feedback">
      Please provide a valid zip.
    </div>
  </div>
  <div class="col-12">
    <div class="form-check">
      <input class="form-check-input" type="checkbox" value="" id="invalidCheck" required>
      <label class="form-check-label" for="invalidCheck">
        Agree to terms and conditions
      </label>
      <div class="invalid-feedback">
        You must agree before submitting.
      </div>
    </div>
  </div>
  <div class="col-12">
    <button class="btn btn-primary" type="submit">Submit form</button>
  </div>
</form>

// Example starter JavaScript for disabling form submissions if there are invalid fields
(() => {
  'use strict'

  // Fetch all the forms we want to apply custom Bootstrap validation styles to
  const forms = document.querySelectorAll('.needs-validation')

  // Loop over them and prevent submission
  Array.from(forms).forEach(form => {
    form.addEventListener('submit', event => {
      if (!form.checkValidity()) {
        event.preventDefault()
        event.stopPropagation()
      }

      form.classList.add('was-validated')
    }, false)
  })
})()

Fa'aletonu le browser

Le fiafia i fe'au tali fa'amaonia fa'ale-aganu'u po'o le tusiaina o le Javascript e sui ai le faiga o amio? Lelei mea uma, e mafai ona e faʻaogaina le faʻaogaina o le browser. Taumafai e lafo le fomu i lalo. Fa'alagolago i lau su'esu'ega ma le OS, o le a e va'ai i se sitaili la'ititi o fa'amatalaga.

E ui e le mafai ona fa'avasegaina nei sitaili fa'amatalaga ile CSS, e mafai lava ona e fa'avasegaina fa'amatalaga manatu e ala ile JavaScript.

html

<form class="row g-3">
  <div class="col-md-4">
    <label for="validationDefault01" class="form-label">First name</label>
    <input type="text" class="form-control" id="validationDefault01" value="Mark" required>
  </div>
  <div class="col-md-4">
    <label for="validationDefault02" class="form-label">Last name</label>
    <input type="text" class="form-control" id="validationDefault02" value="Otto" required>
  </div>
  <div class="col-md-4">
    <label for="validationDefaultUsername" class="form-label">Username</label>
    <div class="input-group">
      <span class="input-group-text" id="inputGroupPrepend2">@</span>
      <input type="text" class="form-control" id="validationDefaultUsername"  aria-describedby="inputGroupPrepend2" required>
    </div>
  </div>
  <div class="col-md-6">
    <label for="validationDefault03" class="form-label">City</label>
    <input type="text" class="form-control" id="validationDefault03" required>
  </div>
  <div class="col-md-3">
    <label for="validationDefault04" class="form-label">State</label>
    <select class="form-select" id="validationDefault04" required>
      <option selected disabled value="">Choose...</option>
      <option>...</option>
    </select>
  </div>
  <div class="col-md-3">
    <label for="validationDefault05" class="form-label">Zip</label>
    <input type="text" class="form-control" id="validationDefault05" required>
  </div>
  <div class="col-12">
    <div class="form-check">
      <input class="form-check-input" type="checkbox" value="" id="invalidCheck2" required>
      <label class="form-check-label" for="invalidCheck2">
        Agree to terms and conditions
      </label>
    </div>
  </div>
  <div class="col-12">
    <button class="btn btn-primary" type="submit">Submit form</button>
  </div>
</form>

Itu o le server

Matou te fautuaina le faʻaogaina o le faʻamaoniga a le tagata faʻatau, ae afai e te manaʻomia le faʻamaoniaina o le server-side, e mafai ona e faʻaalia le le aoga ma le aoga fomu .is-invalidma .is-valid. Manatua .invalid-feedbacko loʻo lagolagoina foi i nei vasega.

Mo fanua le aoga, ia mautinoa o le faʻamatalaga le aoga / faʻamatalaga sese e fesoʻotaʻi ma le faʻailoga talafeagai e faʻaaoga ai aria-describedby(matauina o lenei uiga e mafai ai ona sili atu ma le tasi ide faʻasino i ai, i le tulaga ua uma ona faasino le fanua i tusitusiga faʻaopoopo).

Ina ia foia faafitauli i le laina o tuaoi , e manaʻomia e vaega faʻapipiʻi se isi .has-validationvasega.

html

<form class="row g-3">
  <div class="col-md-4">
    <label for="validationServer01" class="form-label">First name</label>
    <input type="text" class="form-control is-valid" id="validationServer01" value="Mark" required>
    <div class="valid-feedback">
      Looks good!
    </div>
  </div>
  <div class="col-md-4">
    <label for="validationServer02" class="form-label">Last name</label>
    <input type="text" class="form-control is-valid" id="validationServer02" value="Otto" required>
    <div class="valid-feedback">
      Looks good!
    </div>
  </div>
  <div class="col-md-4">
    <label for="validationServerUsername" class="form-label">Username</label>
    <div class="input-group has-validation">
      <span class="input-group-text" id="inputGroupPrepend3">@</span>
      <input type="text" class="form-control is-invalid" id="validationServerUsername" aria-describedby="inputGroupPrepend3 validationServerUsernameFeedback" required>
      <div id="validationServerUsernameFeedback" class="invalid-feedback">
        Please choose a username.
      </div>
    </div>
  </div>
  <div class="col-md-6">
    <label for="validationServer03" class="form-label">City</label>
    <input type="text" class="form-control is-invalid" id="validationServer03" aria-describedby="validationServer03Feedback" required>
    <div id="validationServer03Feedback" class="invalid-feedback">
      Please provide a valid city.
    </div>
  </div>
  <div class="col-md-3">
    <label for="validationServer04" class="form-label">State</label>
    <select class="form-select is-invalid" id="validationServer04" aria-describedby="validationServer04Feedback" required>
      <option selected disabled value="">Choose...</option>
      <option>...</option>
    </select>
    <div id="validationServer04Feedback" class="invalid-feedback">
      Please select a valid state.
    </div>
  </div>
  <div class="col-md-3">
    <label for="validationServer05" class="form-label">Zip</label>
    <input type="text" class="form-control is-invalid" id="validationServer05" aria-describedby="validationServer05Feedback" required>
    <div id="validationServer05Feedback" class="invalid-feedback">
      Please provide a valid zip.
    </div>
  </div>
  <div class="col-12">
    <div class="form-check">
      <input class="form-check-input is-invalid" type="checkbox" value="" id="invalidCheck3" aria-describedby="invalidCheck3Feedback" required>
      <label class="form-check-label" for="invalidCheck3">
        Agree to terms and conditions
      </label>
      <div id="invalidCheck3Feedback" class="invalid-feedback">
        You must agree before submitting.
      </div>
    </div>
  </div>
  <div class="col-12">
    <button class="btn btn-primary" type="submit">Submit form</button>
  </div>
</form>

Elemene lagolago

O lo'o avanoa sitaili fa'amaonia mo fa'atonuga ma vaega nei:

<input>s ma <textarea>s faʻatasi ma .form-control(e aofia ai le oʻo atu i le tasi .form-controli vaega faʻapipiʻi)
<select>ma.form-select
.form-checks

html

<form class="was-validated">
  <div class="mb-3">
    <label for="validationTextarea" class="form-label">Textarea</label>
    <textarea class="form-control" id="validationTextarea" placeholder="Required example textarea" required></textarea>
    <div class="invalid-feedback">
      Please enter a message in the textarea.
    </div>
  </div>

  <div class="form-check mb-3">
    <input type="checkbox" class="form-check-input" id="validationFormCheck1" required>
    <label class="form-check-label" for="validationFormCheck1">Check this checkbox</label>
    <div class="invalid-feedback">Example invalid feedback text</div>
  </div>

  <div class="form-check">
    <input type="radio" class="form-check-input" id="validationFormCheck2" name="radio-stacked" required>
    <label class="form-check-label" for="validationFormCheck2">Toggle this radio</label>
  </div>
  <div class="form-check mb-3">
    <input type="radio" class="form-check-input" id="validationFormCheck3" name="radio-stacked" required>
    <label class="form-check-label" for="validationFormCheck3">Or toggle this other radio</label>
    <div class="invalid-feedback">More example invalid feedback text</div>
  </div>

  <div class="mb-3">
    <select class="form-select" required aria-label="select example">
      <option value="">Open this select menu</option>
      <option value="1">One</option>
      <option value="2">Two</option>
      <option value="3">Three</option>
    </select>
    <div class="invalid-feedback">Example invalid select feedback</div>
  </div>

  <div class="mb-3">
    <input type="file" class="form-control" aria-label="file example" required>
    <div class="invalid-feedback">Example invalid form file feedback</div>
  </div>

  <div class="mb-3">
    <button class="btn btn-primary" type="submit" disabled>Submit form</button>
  </div>
</form>

Mea faigaluega

Afai e fa'ataga e lau fomu, e mafai ona e fesuia'i .{valid|invalid}-feedbackvasega mo .{valid|invalid}-tooltipvasega e fa'aalia ai fa'amatalaga fa'amaonia i se fa'ailoga meafaigaluega. Ia mautinoa e iai se matua position: relativeo iai mo le fa'atulagaina o meafaigaluega. I le faʻataʻitaʻiga o loʻo i lalo, o matou vasega koluma ua uma ona iai lenei mea, ae o lau poloketi e ono manaʻomia se isi seti.

html

<form class="row g-3 needs-validation" novalidate>
  <div class="col-md-4 position-relative">
    <label for="validationTooltip01" class="form-label">First name</label>
    <input type="text" class="form-control" id="validationTooltip01" value="Mark" required>
    <div class="valid-tooltip">
      Looks good!
    </div>
  </div>
  <div class="col-md-4 position-relative">
    <label for="validationTooltip02" class="form-label">Last name</label>
    <input type="text" class="form-control" id="validationTooltip02" value="Otto" required>
    <div class="valid-tooltip">
      Looks good!
    </div>
  </div>
  <div class="col-md-4 position-relative">
    <label for="validationTooltipUsername" class="form-label">Username</label>
    <div class="input-group has-validation">
      <span class="input-group-text" id="validationTooltipUsernamePrepend">@</span>
      <input type="text" class="form-control" id="validationTooltipUsername" aria-describedby="validationTooltipUsernamePrepend" required>
      <div class="invalid-tooltip">
        Please choose a unique and valid username.
      </div>
    </div>
  </div>
  <div class="col-md-6 position-relative">
    <label for="validationTooltip03" class="form-label">City</label>
    <input type="text" class="form-control" id="validationTooltip03" required>
    <div class="invalid-tooltip">
      Please provide a valid city.
    </div>
  </div>
  <div class="col-md-3 position-relative">
    <label for="validationTooltip04" class="form-label">State</label>
    <select class="form-select" id="validationTooltip04" required>
      <option selected disabled value="">Choose...</option>
      <option>...</option>
    </select>
    <div class="invalid-tooltip">
      Please select a valid state.
    </div>
  </div>
  <div class="col-md-3 position-relative">
    <label for="validationTooltip05" class="form-label">Zip</label>
    <input type="text" class="form-control" id="validationTooltip05" required>
    <div class="invalid-tooltip">
      Please provide a valid zip.
    </div>
  </div>
  <div class="col-12">
    <button class="btn btn-primary" type="submit">Submit form</button>
  </div>
</form>

Sass

Fuafuaga

$form-feedback-margin-top:          $form-text-margin-top;
$form-feedback-font-size:           $form-text-font-size;
$form-feedback-font-style:          $form-text-font-style;
$form-feedback-valid-color:         $success;
$form-feedback-invalid-color:       $danger;

$form-feedback-icon-valid-color:    $form-feedback-valid-color;
$form-feedback-icon-valid:          url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'><path fill='#{$form-feedback-icon-valid-color}' d='M2.3 6.73.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/></svg>");
$form-feedback-icon-invalid-color:  $form-feedback-invalid-color;
$form-feedback-icon-invalid:        url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='#{$form-feedback-icon-invalid-color}'><circle cx='6' cy='6' r='4.5'/><path stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/><circle cx='6' cy='8.2' r='.6' fill='#{$form-feedback-icon-invalid-color}' stroke='none'/></svg>");

Mixins

E lua fa'afefiloi e tu'ufa'atasia, e ala i la tatou matasele , e fa'atupu ai a tatou sitaili fa'amaonia fa'amaonia.

@mixin form-validation-state-selector($state) {
  @if ($state == "valid" or $state == "invalid") {
    .was-validated #{if(&, "&", "")}:#{$state},
    #{if(&, "&", "")}.is-#{$state} {
      @content;
    }
  } @else {
    #{if(&, "&", "")}.is-#{$state} {
      @content;
    }
  }
}

@mixin form-validation-state(
  $state,
  $color,
  $icon,
  $tooltip-color: color-contrast($color),
  $tooltip-bg-color: rgba($color, $form-feedback-tooltip-opacity),
  $focus-box-shadow: 0 0 $input-btn-focus-blur $input-focus-width rgba($color, $input-btn-focus-color-opacity)
) {
  .#{$state}-feedback {
    display: none;
    width: 100%;
    margin-top: $form-feedback-margin-top;
    @include font-size($form-feedback-font-size);
    font-style: $form-feedback-font-style;
    color: $color;
  }

  .#{$state}-tooltip {
    position: absolute;
    top: 100%;
    z-index: 5;
    display: none;
    max-width: 100%; // Contain to parent when possible
    padding: $form-feedback-tooltip-padding-y $form-feedback-tooltip-padding-x;
    margin-top: .1rem;
    @include font-size($form-feedback-tooltip-font-size);
    line-height: $form-feedback-tooltip-line-height;
    color: $tooltip-color;
    background-color: $tooltip-bg-color;
    @include border-radius($form-feedback-tooltip-border-radius);
  }

  @include form-validation-state-selector($state) {
    ~ .#{$state}-feedback,
    ~ .#{$state}-tooltip {
      display: block;
    }
  }

  .form-control {
    @include form-validation-state-selector($state) {
      border-color: $color;

      @if $enable-validation-icons {
        padding-right: $input-height-inner;
        background-image: escape-svg($icon);
        background-repeat: no-repeat;
        background-position: right $input-height-inner-quarter center;
        background-size: $input-height-inner-half $input-height-inner-half;
      }

      &:focus {
        border-color: $color;
        box-shadow: $focus-box-shadow;
      }
    }
  }

  // stylelint-disable-next-line selector-no-qualifying-type
  textarea.form-control {
    @include form-validation-state-selector($state) {
      @if $enable-validation-icons {
        padding-right: $input-height-inner;
        background-position: top $input-height-inner-quarter right $input-height-inner-quarter;
      }
    }
  }

  .form-select {
    @include form-validation-state-selector($state) {
      border-color: $color;

      @if $enable-validation-icons {
        &:not([multiple]):not([size]),
        &:not([multiple])[size="1"] {
          padding-right: $form-select-feedback-icon-padding-end;
          background-image: escape-svg($form-select-indicator), escape-svg($icon);
          background-position: $form-select-bg-position, $form-select-feedback-icon-position;
          background-size: $form-select-bg-size, $form-select-feedback-icon-size;
        }
      }

      &:focus {
        border-color: $color;
        box-shadow: $focus-box-shadow;
      }
    }
  }

  .form-control-color {
    @include form-validation-state-selector($state) {
      @if $enable-validation-icons {
        width: add($form-color-width, $input-height-inner);
      }
    }
  }

  .form-check-input {
    @include form-validation-state-selector($state) {
      border-color: $color;

      &:checked {
        background-color: $color;
      }

      &:focus {
        box-shadow: $focus-box-shadow;
      }

      ~ .form-check-label {
        color: $color;
      }
    }
  }
  .form-check-inline .form-check-input {
    ~ .#{$state}-feedback {
      margin-left: .5em;
    }
  }

  .input-group {
    > .form-control:not(:focus),
    > .form-select:not(:focus),
    > .form-floating:not(:focus-within) {
      @include form-validation-state-selector($state) {
        @if $state == "valid" {
          z-index: 3;
        } @else if $state == "invalid" {
          z-index: 4;
        }
      }
    }
  }
}

Fa'afanua

O le fa'amaoniga lea o le fa'afanua Sass mai _variables.scss. Fa'asili pe fa'alautele le mea lea e fa'atupu ai tulaga ese pe fa'aopoopo.

$form-validation-states: (
  "valid": (
    "color": $form-feedback-valid-color,
    "icon": $form-feedback-icon-valid
  ),
  "invalid": (
    "color": $form-feedback-invalid-color,
    "icon": $form-feedback-icon-invalid
  )
);

Fa'afanua o $form-validation-statese mafai ona iai ni ta'otoga e tolu e fa'asili ai mea faigaluega ma sitaili fa'atatau.

Ta'amilosaga

Fa'aaoga e fa'asolo i luga $form-validation-stateso fa'afanua fa'atatau e fa'atupu ai a tatou sitaili fa'amaonia. So'o se suiga i le fa'afanua Sass o lo'o i luga o le a atagia i lau CSS tu'ufa'atasi e ala i lenei matasele.

@each $state, $data in $form-validation-states {
  @include form-validation-state($state, $data...);
}

Fa'asinomaga

O setete faʻamaonia e mafai ona faʻapitoa e ala i le Sass ma le $form-validation-statesfaʻafanua. O loʻo i totonu o la matou _variables.scssfaila, o lenei faʻafanua Sass o le auala matou te faʻatupuina ai le tulaga le lelei valid/ invalidfaʻamaonia. O lo'o aofia ai se fa'afanua fa'apipi'i mo le fa'avasegaina o lanu o setete ta'itasi, fa'ailoga, lanu o meafaigaluega, ma le ata lafoia. E ui e leai se isi setete e lagolagoina e tagata su'esu'e, oi latou o lo'o fa'aogaina sitaili masani e faigofie ona fa'aopoopoina fa'amatalaga fa'apitoa.